Billet Radiator Cap - 18-psi Black

The DRAG RACE SOLUTIONS Billet Radiator Cap – 18-psi Black (Part No. 3300-007B) is a precision-engineered cooling system component designed for high-performance vehicles that demand reliable thermal management under extreme conditions. Built from billet aluminum and finished with durable black powder coat, this 18 PSI radiator cap combines functional engineering with corrosion-resistant construction suitable for demanding automotive environments.

The 18 PSI pressure rating is calibrated for cooling systems that operate under sustained load, where precise pressure control directly affects engine temperature stability and coolant boil-over prevention. The round design with notch grip provides positive hand-grip control during installation and maintenance, eliminating slippage on standard radiator filler necks. Billet aluminum construction ensures superior strength-to-weight ratio compared to cast alternatives, reducing deflection under thermal cycling and vibration—critical for competition vehicles, engine swaps, and high-output applications where cooling system integrity is non-negotiable.

This cap serves operators of drag racing platforms, turbocharged street machines, and track-oriented builds where maintaining consistent coolant pressure prevents vapor lock and overheating. The black powder-coated finish resists corrosion from coolant additives and salt exposure, maintaining appearance and function across multiple seasons of heavy use. Each cap is a single unit—a direct replacement for OEM or aftermarket radiator systems requiring precise pressure matching.

Cooling system caps are often overlooked in performance builds, yet they play a critical role in maintaining optimal engine temperature. DRAG RACE SOLUTIONS positions this billet cap as a purpose-built component for users who prioritize thermal management precision and durability under competition or high-stress conditions. Weighing just 0.32 lbs and fitting standard radiator openings, it integrates seamlessly into existing cooling architectures without modification.